Antiarrhythmics

Q1 • Question 1

Class I antiarrhythmics primarily block which channel?

Calcium Sodium Potassium Funny current

Q2 • Question 2

Which class prolongs phase 3 repolarization?

Class I Class II Class III Class IV

Q3 • Question 3

Amiodarone most resembles which class?

I II III IV

Q4 • Question 4

Beta blockers suppress arrhythmias mainly by affecting:

SA node automaticity Platelets Vascular tone Kidney filtration

Q5 • Question 5

Which drug treats acute PSVT first line IV?

Verapamil Adenosine Amiodarone Lidocaine

Q6 • Question 6

Lidocaine is best for:

Atrial flutter Ventricular arrhythmias post MI Sinus bradycardia Hypertension

Q7 • Question 7

Which prolongs QT most?

Flecainide Sotalol Metoprolol Diltiazem

Q8 • Question 8

Risk of torsades is highest with:

Amiodarone Dofetilide Metoprolol Digoxin

Q9 • Question 9

Digoxin controls rate in AF by:

Increasing vagal tone Increasing BP Reducing preload Increasing K excretion

Q10 • Question 10

Calcium channel blockers slow conduction at:

Purkinje fibers AV node Ventricles Atria only

Q11 • Question 11

Which is contraindicated in WPW with AF?

Procainamide Amiodarone Verapamil Ibutilide

Q12 • Question 12

Class IC drugs are best for:

Structural heart disease Normal hearts with AF Heart failure Bradycardia

Q13 • Question 13

Amiodarone major toxicity:

Pulmonary fibrosis Renal failure Pancreatitis Seizures

Q14 • Question 14

Drug causing blue skin discoloration:

Sotalol Quinidine Amiodarone Digoxin

Q15 • Question 15

Magnesium treats:

SVT Torsades AF Bradycardia

Q16 • Question 16

Atropine treats:

V tach Sinus bradycardia AF Heart block type II

Q17 • Question 17

Procainamide useful for:

WPW tachycardia Torsades Sinus arrest HTN

Q18 • Question 18

Class IA effect on QT:

Shorten No change Prolong Variable

Q19 • Question 19

Class IB effect:

Shortens AP Prolongs AP No change Stops SA node

Q20 • Question 20

Which slows AV node most?

Metoprolol Verapamil Adenosine All

Q21 • Question 21

Drug for long term AF rhythm control in HF:

Flecainide Amiodarone Verapamil Diltiazem

Q22 • Question 22

Digoxin toxicity worsened by:

Hyperkalemia Hypokalemia Hypercalcemia only Low sodium

Q23 • Question 23

Ibutilide converts:

AF/Flutter to sinus VT to sinus Bradycardia Heart block

Q24 • Question 24

Sotalol also acts as:

Alpha blocker Beta blocker Calcium blocker ACE inhibitor

Q25 • Question 25

Which drug blocks funny current?

Ivabradine Adenosine Digoxin Metoprolol

Q26 • Question 26

Quinidine adverse effect:

Cinchonism Pulmonary fibrosis Thyroid storm Pancreatitis

Q27 • Question 27

First drug for stable monomorphic VT:

Amiodarone Adenosine Digoxin Atropine

Q28 • Question 28

Torsades ECG hallmark:

Wide fixed QRS Twisting axis Flatline Delta wave

Q29 • Question 29

Verapamil contraindicated in:

AF with RVR SVT Systolic heart failure Angina

Q30 • Question 30

Which increases AV node refractory period?

Beta blockers CCBs Adenosine All